EP 0577085 A2 19940105 - Method and apparatus for determining visually perceptible differences between images.
Title (en)
Method and apparatus for determining visually perceptible differences between images.
Title (de)
Verfahren und Vorrichtung zur Feststellung von sichtbaren Unterschieden zwischen Bildern.
Title (fr)
Procédé et dispositif pour déterminer des différences visibles entre images.
Publication
Application
Priority
US 90660392 A 19920630
Abstract (en)
Visual differences between a first and second image are determined by first modifying the first and second image signals to model non-linear response to luminance in cone receptors of an eye, modifying the first and second image signals to compensate for both optical properties of the eyes and neural interaction between cells in a retina, adjusting sensitivity to image differences to model the ability of the human visual system to discern features in an image, and comparing the first and second image signals based on the adjusted sensitivity. An output based on this comparison is provided in the form of either an in-context map having first and second colors superimposed on one of the images to moderate differences or in the form of a free-form map having light and dark pixels thereon indicating differences. <IMAGE>
IPC 1-7
IPC 8 full level
G01B 11/24 (2006.01); G06T 5/50 (2006.01); G06T 7/00 (2006.01); H04N 7/26 (2006.01); H04N 7/30 (2006.01)
CPC (source: EP US)
G06T 5/50 (2013.01 - EP US); H04N 19/154 (2014.11 - EP US); H04N 19/527 (2014.11 - EP US); H04N 19/80 (2014.11 - EP US); H04N 19/86 (2014.11 - EP US); H04N 19/60 (2014.11 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0577085 A2 19940105; EP 0577085 A3 19940511; JP H0696218 A 19940408; US 5394483 A 19950228
DOCDB simple family (application)
EP 93110380 A 19930629; JP 15756893 A 19930628; US 90660392 A 19920630